Pocket camera



sept. 12, 195o f E PRLIN 2,521,743

POCKET CAMERA Filed N011. 28, 1947 2 Sheets-Sheet 2 INVENTOR. FREDPERL/N `ATTORNEY Patented Sept. 12, 195o fritti:

Development Corporation, corporation of New York A Application November28, 1947, Seria-1No 'l8l ;ll8 y 21 Claims. l(Cl. S35- 33) `The =presentinventionrelates to cameras and,

more particularly; to miniature cameras c some;

' timesreferred toas fbutton hole or detective cameras'. l

An object of 'the invention is to 'provide a camera of small dimensionsand simple construction.'

Another object ef the invention is te" provide a camera wherein aiilmisfsupported so as'to permit a plurali'tyof exposures withoutdisplacefmentof tlie"`lm relative to its support.

` the une v| lan efFig. legend] A further objectof .the invention is toprovide a camerain which a nlm-carrying cartridge may be removably' heldina housingin such a manner that, Whenthe cartridge is withdrawn fromthe housing either before orafter all the exposures available havebeencompleted, all light will be efectivelycut off from" Ythe lmlocatedwinside the cartridge. Still another object of the invention isto provide, in or for a camera, a filmcarrying 4cartridge provided Witha. light trap which protects the film from aecidentaleiposuretolightuntil the cartridge `has beenjinserted into the camera.

Yet ajfurthe'r object fof-,the invention is to provide anew.andsimpleshutter mechanism, particularly for miniature cameras;which fis yquick- I: actingfinmoperation and forms a double seal to shutout'thelight.

With above, which 'will appear `as the description proceeds,thisinvention residesin the novel construction,

' combination and'arrangement of `parts substantially ashereinafterdescribed andmore particu- .:larly defined by thefappendedclaims, itk being .nder'sto'od that such'clianges in the precise'ern;

bodiment of the hereindisclosed'invention may be made as come yWithinthe scope of the claims.

Thev accompa'nying drawings illustrate one .complete example of lthephysical embodiment of the invention constructed according to thelbestand other vobjects lin view,

New York, a

Figi 6a is a fragmentary view 'siniilar'fto 6, showing'a'modication; d

Figs." 7, 8 and 9 show the shuttermechanism in three differentpositions; i

"Fig. 10 isa View similarto Figj5f`showing a modified form 4v'of cameraaccordingfto the in- Fig. 11 is a longitudinal crojssseotion on Fig1.2is'a'1ongitudifg1a1-fero -eeaenftakefrion vReferring tothe drawing,camera-according to the invention'coin'pri's'esI ahousing,`generally'indicated at 13 Vand'lacartridgagenerally indicated at I4.The housing I3 has the general `form of a socket,r comprising thecylindrical' `Wall I5 and the front Wallv Iii'` which. is recessed at`Il,

I8 and apertured at IS. Recesses I1 and I3 serve to accommodate,respectivelya 'klever 2E) land a disc2l, forming part of Vthe shuttermech- "anism 'members 20, 2I are lpivoted to thefront wall ISsubsequently described. The shutter Formed integreuy with theffeneweurvls' are two supportingmembers 24.25 for a prism 2S and a `lens21, the lens and the prism'serving to v`focus, and tjdefleet the raysofthe iight eene 28 (Fig. 4) entering through the aperture i I Q,"where- *by an image wil-l be projected'upon the inner surface of a'lm25 which rests against the' cylindrical inner surface of wall 30 of 'thecartridge I4, provided the latterv isheld in its 'operative f positionasilustrated in Figs. 3 and 4.*"Members 24, 25, which may be securedto-tl'ielensand-the "prism in any convenient mannenflasby 'glu'eing alsoserve as amask'for the d'eected-light cone mode so far .devised for thepractical application of the principles thereof, and in which:

Figs. 1 and 2 are arear View and a vfront View, respectively, of a4carriera [according to the inve'ntion, thetwo Views being relativelyoffset by Figf3 is allongitudinalcross sectiontaken on the line .3430iFig. 2;

Fig. 4 is a longitudinal cross section taken on the line 4 -4vof Fig.1;f Fig. .5 is a rear View of the camera with the cartridge removed;

Fig. 6 is a crosssectional View of the cartridge, taken online 5-6ofFig. 1;

"4' :Discy 32 is formed With ai. recessed jedge 34" co- 50operating withan inturned lip 35 of rthefc'ylin-v 28 so as to permit only arectangular portion thereof, of va Width correspondingto the spacingbetween these ltwo members, to impinge upon the surfaceof film 29.

The cartridge I4 comprises, i addition to the l cylindrical Wall 30, acup-shaped` rear member 3l fitting tightlyover the end of cylinder, a

ldisc 32 movablyiitting into Ithecylinder 30, and a conical spring'33inserted''betweenv the disc 32- `and the rear` wall 3l, the springtending to displace the disc 32 toward the front'of the cylinder.

der 3l), thereby forming a light trapwhichprevents lthe entrance oflight into? the' interior of the cartridge Whenever the disc 32 is initsrightmost position (as viewed inFig. 6). The `cylinder 30 may beformed with a plnof axially latter to be collapsed to such lan extentthat' disc 32 almost abuts the rear wall 3| ofcartridge I4, as shown inFigs. 4 and 5. To insert a lm 29 into the cartridge, the rear member 3|is disengaged from the cylinder and the film thereupon positioned sothat its front edge protrudes into the channel formed by the lip 35.Although, in some cases, it will be suflicient to press-nt the 4 moreparticularly to Figs. 7 through 9, it will be seen that lever 20 isprovided with an elongated hole 55 and with a pin 56, the lattercooperating with a pear-shaped aperture 51 in the disc 2| whereby thelatter is entrained by the pin 56 when the lever 20 is swung about itspivot 22, the

. disc'rotating within therecess 'I8 about its pivot lwith the ridge K59.

23'. Lever 20 is provided with a Ireduced portion 58 which is beveled toform a ridge 59; referring to Fig. 3, the cover 5I has a dimple orprojection 6I) ,whereby the surrounding cover portion will beresiliently deected outwardly, as illustrated in thisgure, whenever theprojection 60 registers The latter is the case when th'elever is'initsintermediate position shown in Fig. 8, and it will thus be seen that theresilient cover "5 I acts as a spring tending to make part 3| around thecylinder 30, the cylinder and f the ange 39 of member 3| may also bethreaded iorthis ,purposejas shown at 40 in Fig. 6u, The

readily understood.

itsemulsion side facing inward, as will be `'Ilhe supporting members24,25 are-formed at their rearends with respective *shoulders 4I, 42

whichven'gage the periphery of a circular recess v43, provided in disc32, when the cartridge I4 is inserted 'into the housing 3;-1 thus thedisc 32 is :pushed toward the rear-of theA cartridge/compressing thespring 337andexposing the lm 29 to any light entering the interior ofVthe camera A by way of the optical system 26, 21. Shoulders V4 I,42fals0 act as guides to lneepnthedisc` 32 cenlterellwit respect t@ theACylinder 3.0, SQ as t0 prevent any scratching of, the sensitive lmsurface` by Vthe circumference of the disc. i j A UIf the width of theimageprojected upon the l m 29` is somewhat less thanUone-eighth of aiull circle, it willbe'possible tov'make eight exposureson a single nlmby rotating the cartridge through an angle of 45 after each exy posureFor this purpose,'theflange 39 ofppart 3| is provided with eightvuniformly;spacedV notches 43, numbered'l-B, respectively, which co-Qperate with agresilient latch 44 provided on lthe A' j cylinder wall I5 of housing I3, whereby thekcartridge I4-may be indexed successively ineight'dif- Y ferentjangular positions. The rim 39is `further providedwith a recess 45 which must be aligned ,'YJvith the latch 4 4 vwhenthecartridge I4 isuto be Ah jinsertedintothe housing I3. When the cartridgelhas reached its Vinnermost position, it is vrotated in ajcounter-clockwise'Y direction (ashviewed in "Fig 1) until the latch 44engages the rst notch,

`inwhich position theedge 380i lm 29 will have' moved` beyond the pathof' the light beam 28. It

will be seen that the latch 44 also serves to rei ,'-tain the cartridgeVI4 Vinside the housing' I3, [against .the action o fcoil spring 33;thus, if `the last exposure has been made 'andthe cartridge is Yfrotatedto .align the latch 44 once morewith the `recess 45,*spring 33will act toeject the cartridge vautomatically'from the housing.

{T he latchi44 may be secured to the cylinder I5 by.. any convenientmeans, as by set screws 46, may'carrywa projection 41 to serve'` as aback vsight'forf the camera, cooperating with a rey v "tractabletrarnernembe'rI 48"representing ,the acf sociated front sight. The framemember 48 is c. f slidably r'held guides 49, v5I) which are securedyto'aifrlrit cover 5I engaging the forward end of housing I 3. Theflange portion 52 of cover 5I is fsigtre'dlanss to auow'for theprotrusion of an 'e'xtension 54 'of lever 20, and to provide r'oom forthe lateral vmovement thereof.` Referringndw,

'nim'zs'shouid be positioned in the cylinder se f Ythis intermediateposition of the lever 20 an unstable one, whereby 'the lever willnormally be bL,maintained. inv either,ofl.litstwo marginal posi-y tionsi illustrated inFigs ,77 and 9.

^- frhe disczl 1art1-ther provided withahoie sl which yregisters withyholes I9 and 55 fwhenthe lever is in itsE intermediate,unstable'position, whereby light from'the outside may "enter the lens 21by way ofthe aperture 62 in cover 5I and i the holes I9,;455 and I6Ialigned therewith. To Hmalge. an exposure, fthe projecting'portioi `54of AVlever 20-issimply displacedfrombne marginal position (Fig. '7) intothe vother v(Fig.y 9),4 or vice versa, whereby theapertures 55`ri'dl 6I'will move :towards 'each 'other' and will register fora briei Ainstant(Fig. 8) the duration of the' exposure beingde'terrnined at least inpart, by the resiliency of the cover 5Iand by'themoment of inertia ofthe lshuttermechanism 20, 2|, as well as by the dimensionsf'ap'e'rtures- 55 and 6I. [Whenthe shutter is in its marginalor'stableposition accordingtoFig. 7 orr 9, the-path oflig'ht toward thelens 21 will be interrupted byboth shutter members 20v and 2|.

: yinthe embodiment ofthe invention illustrated in Figs. 3 and 4, aclearance is provided between the lens 21andthe prism `2.6 by virtue ofthe in -ser'tion of spacers 63,.'64 between these two elements. It willralso be understood that, for focusingA purposes, 4the distancebetweenthe lens 21 and the prism 26 may be'made variablefby any convenientmeans (not shown). Since, however, y.the dimensions of the cameraaccording to the invention are preferably small "(the drawing be- I inga 2:1 enlargement of a camera'y actually conffstructed), such adjustmentmay usually be dis- A. fp ensed with.V It'willthen-be possible,according toa furtherfie'ature of the invention, to combine thelensandtheprism into a single optical ele- 4 Vment 65 -as shown inthe-modification illustrated A in wFigs.- 10 through-.12. Furthermore,while in the embodiment previously described there has been shown ahousing I3 made of moldable plastic material, Figs. 10, 11 and '12illustrate amodication wherein the housing I3' is made of swaged sheetmetal parts secured together in any fpractical manner, preferably byspot -welding.

The 4ina'sl'zing andv supporting members 24,25

have'beenreplaced by a single, channeled memj, ber which isclosed at thebackandr bears a sh'oulder'61 to cooperate with ther'ec'ess` 43 ofcartridge |4. `B ent--over portions'orlugs 68, partiallyA punched outfrom the membery 66, may yform a seat forthe element `65 which, in thepresent case, may be inserted into the vmember 66 from the front endthereof'and will be held in place by the dished portion 10 ofiront wallI6',

portions 69 and 10"b'eingrespectively/formed so 55 as to providerecesses II andIS corresponding to the recesses I1 and I8 in Figs. 1-9.Lugs 1I, 'I2 are integral with the member 66 and serve to secure thelatter to portions 69 and 10, respectively, as by being spot weldedthereto. The element 65 may be glued or otherwise iixed to the member 66after being correctly located, as described, in its predeterminedposition relative thereto. A ange 13, recessed at 'I4 to provide roomfor the lever 20 (not shown in Figs. 10-12), serves to mount thefrontpart I6 upon the cylindrical wall portion I. It will be understoodthat an additional cover member, such as 5I in Figs. 3 and 4, fits overthe flange 'I3 of part I6', and that the shutter mechanism to beassociated with the housing I5' may be of the type disclosed .in Figs.'7,v 8 and 9. Cover 5I may be removably secured to the housing, eitherI3 or I3', in any convenient manner, as by the provision of set screwssuch as the screw 'I5 shownv in Fig. 4.

Although the features of my invention. herein disclosed are preferablyincorporated in a camera ofrelatively small dimensions, it will beunderstood that the invention, by its' nature, is not limited tominiature cameras' and that, furthermore, any 0f its features or"combina'tionvthereof may be used in association with" conventionalyelements. Also,'it will befap'preciated that'the lensand-prismcombination shown' maybe replaced by any optically equivalent system,.as by' a lensand-mirror combination, and that'various othervmodiiications and adaptations of the specic embodiments described andillustrated may be made by those skilled'in'the art lwithout departingfrom the spirit or exceeding the scope ofi the `invention as defined in'the objects and' in the appended claims. W n 'i f 1. A cameracomprisingfa `housing havinga socket; a cartridgev removably'fttiriginto said socket, n said cartridgev ycomprising a tubular shell adaptedto have a Iilm positioned'ad'jacent toits inner surface, a closurememberf-`sealing on 'the rear end of said'shelL'a disc for closing 'thefront end of the shelLsaid disc b'eing slidable within the''shell,'means lbiasing the disc toward the front endof the shell, andmeans at said front end of the shell cooperable with the disc'tolimitforward movement ofthe vdisc and form alight trap; a projection carriedbythe housing'within its socketand extending toward the mouth there,- ofto displace said discagai'nst the. action ofxts biasing means -1 towardthef rear end .off the i cartridge and thereby expose the film carriedbythe cartridgauponinsertion 'of' theiatter into the housing socket;latch .means onthe housing adapted to retain the cartridge in thesocket; and an'optical system' in the housing adapted to project theimage'of Van external objectupon the nlm thus exposed. j f u g 2. Acamera according to lclaim lwherein said biasing means comprisesafconical-coil spring inserted between said closure member and saiddisc.

3. .A camera according to claimv lfwhereinsaid closure member isremovablefrom said-,shell to permit the insertion of anlm into the,latter.y

4. A camera according to claim l wherein said latch means comprisesaresilient member adapted to engage said closure memben'the latterbeingformed with a peripheral recess permitting di.,- engagement of saidclosure member from said latch means .when said cartridge isy rotated toalign said recess with said resilient member.

.5. A camera accordingy to claim 4,;furthercom-- prising a projection onsaid vresilient member forming a back sight, a retractable frame mem-Aber forming a front sight, and guide means on said housing slidablysecuring saidframe member to the latter. f

6. A camera according to claim der on said disc so as to maintain thesame in concentric relation to said shell during the dise lplacement ofthe disc.

7. In a camera: a housing having a substan tially cylindrical socketclosed at its frontrby a wall having a light entry aperture; aImcartridge comprising a shell tting into saidfsocket, said shell beingadapted `to have a Afilm positioned adjacentr to its inner surface;alens positioned adjacent to said light entryaperture; light directingmeans adapted to rdirect the light rays entering thelens throughsaidf-apertureupona portion of a lm inthe cartridge when thev latter isin the socket; means mounting the lensqand said light directingmeansin..thehousing,.1said means including a pair of spaced membersex.-Atending rearwardly from the front wallvofthe housing within the socket;land closure 'means adapted to shut out light from the interior of theshell when the lcartridge `is removed from the housing, said closuremeansk including` a disc axially slidable inside `the shell andengageable by said spaced members for displacement toward the rear ofthe shell when .thecartridge is inserted into the socket. f t

8. In a camera, the combinationaccording to claim 7, further comprisingyspacingmeans xing the distance between said ,light directing meansandsaidlens.

9. In a camera, the combination according to claim 7 wherein said lensand said light directing means are integral with each other. i 'v A' 10.In a camera: the combination of'a body member havinga. socket openingvto theback of the body member andclosed vat its inner end by thefrontwall of the body member, said front wall havinga shutter-controlledlight entry a'perfture opening tothe socket; a film ycartridge inem` berinsertable into the socket, saidfi'lm cartridge member comprising acylindrical shell and two end walls, one of which is depr'essibleintothecylindrical shell; /interengagi'ng means on said depressible end wall`and the cylindrical shell providing a light trap to exclude light fromthe interior of the cartridge memberwhen said de'- pressible end'wall isin itsnormal cartridge clos.- ing position, means biasingtheidepressible end wall to itsnormal cartridgeclosing position whilepermitting depression'of said end-wall intothe interior of the shell toenable exposureof. a film overlying the inner surface `of thecylindrical shell; means mounted in thel socket of the body memberpositioned to engage the depressible end wall of the filmcartridge-'member and depress the same as said members are assembled;optical means within the housing socket for 4directing light enteringthe aperture upona defined area on the film in the cartridge member;relative rotation between said members presenting dif- 'ferent definedareas of the .film to the .light projected by said optical meansrandnmeans .for

effecting 'such relative members.

11. In a, camera:A a hollow body having a shut,- ter-controlled lightentry laperture in one wall thereof; a nlm cartridge adapted to have4telescopic engagement with the hollow body, `said film cartridgebeinghollow and adapted to hold rotationy between said 1,iwhere1nfsaid,projection is adapted to cooperate with a shoul-.

a photsensitive"element' therein in position for` andV thereby'`automatically communicate the int'riorfof the' cartridge withfthe inside'of the hollowbody and thus enable'expo'sure of the photosensitiveelement to light rays which enter the. hollow body throughfthe lightentry aperture;

andbpticalfrneans within the hollow body for directin'gsuch lightraysonto the photosensitive elementi* 12 n a carriera;fthe''combinationA of:a body havl shutter-controlled light entry aperture; aho'll wcartridg'eadapted'to hold a photosensitiv'iele'ment therein in position forexposure' and having one-wall thereof yieldingly maintained in closedy"position, said cartridge being adapted for readilyremovable'ass'emblywith the body; means on'the body-positioned' to'engage with said yieldable walliorthe cartridge to move the same loutofitsclo's'ed position during assembly of the cartridge with the body;rand optical means carried bythe body in position to'enter the hollowcartridge as the latter-is assembled-with the body and adapted'when'so'disposed todirect the light 'passies` through the aperture onto thephotosensitive element; i f 13. In a camera: 'a-hollowbody having ashutter-controlled light entry aperture in one wall thereof; a filmcartridge adapted to4 have telescopic engagement with the lhollow body,said iilrn""'artri`dge being hollow and adapted to hold a photosensitiveelement therein in position for exposure andina-ving one wall thereof`yieldingly maintained in a closed position; means on the body engageable'withf said yieldable wall of the cartridge to movethe same from itslclosed position during assemblyofthe cartridgeand hollow body andtherebylautmatically communicate the mtenmiof 'they cartridge with theinside ofthe hollow `body andthus enable vexposure ofthephotosensitiveelement to light rays-which enter the hollow body throughthe light` entry aperture; and optical meansmounted within thehollowbody-inposition -to enter the hollow cartridge 'as the cartridgeisrassembled with they hollow body; said optical meansfbeing adapted -toldirect the blight-*rayswhich venterfthe 'hollow body through-'the light`entry"aperture onto the photo- 'sensitiveelementf f- 14'. 'In'`fa-"came`ra`\,' theccmbination of: aV body member havin'g a socket anda shutter-controlled light ntry'f'aperture leading to the socket; alight-'tight yilm-"ca'1tridge 'adapted to hold a photosensitive"elementin position for exposure andteles'copically andl removably fitting 'intothe sokt, said Acartridge"having one wall thereof ngly 'maintained inclosed position; means carried?? byy the body member engag'e'able withsaid wall o'i thecar'tridge to move the same outoit's"cloed`positio`n'as the cartridgeis inserted 'in o th"esocket tothereby automatically 'communicate-theinterior'of' the cartridge Awiththe insidef'the socket, said'mea'ns being so located wi'threspe'ct tothe depth of thefsocket that as the cartridge is insertedinto thesocket'the yieldfablewallofthe cartridge rernains'in its closed positi'nuntilthe 'cartridge has been inserted a suiiicient extent to effect alight seal between it vand `tiret/socket wall; and optical means withintur'e'i `onto-a predetermined` arear or Ythe yphotoseisitiveelem'entf'f: v ,l f; 4 f A15.- I-n accamera',:;the4combina-tion or: a bodyA havinga socket; aiilm-cartridgeadapted toholda'phctosensitive element torbe exposed; said lm cartridge-l comprisingak cylindricalvfishell with an?- inturned '.an'gefat. onewendy thereof,1Aan endi .'wallfv sli'dablej lwithin the shell .and engageable with theinturned ange, and alspring inside the shell :yieldingly holding saidAend wall infits'y clsed"position,f,said cartridge-being insertableyintothev'socket With'its :yieldable end wallforemost'; `a projection`on the body within the-socket positioned to eng-age said yieldableendi'wall` of the cartridge and depress the same into 'the interior ofthe cartridgeasfthecartridge is inserted,v said'cartridge, beingrotatable within the rsocket; and latchv means forremovably hold;- ingvthe' cartridge; in/the' socket; saidflatch means beingmaintainedincengagement Aby the; force exerted by .the fspringf i in thevcartridge `reacting upon the projection so that upon releaseof the latchsaid spring automatically `ejects the cartridge frcm'the'socket.

16. In a camera: a hollow body member having a front'wall provided witha shutter controlled light entry aperture; a cartridgemember adapted tohold'a photosensitive element to be exposed, saidcartridge member havingend and sidewalls and one of its end walls beingdepressible intotheinterior of the cartridge member-to enable exposure of a photosensitive`element in 4the `cartridge member; said body and cartridge membersbeing telescopically `itted .together and being relatively rotatablewith respect `to each other about the axis of the light entry aperture;means on the body member for depressing the depressible end wall of thecartridge member as these members are assembled so that upon assemblythereof the;i interiorsk Lof said members are brought into( openvcommunication to thereby enable exposure-of4` a photosensitive elementin the cartridge member; optical-means mounted within the bodymemberyfor directing light entering through theaperture upon a defined area ofa photosensitive element positioned in the cartridge member; relativerotation `of said-members presenting diierent defined areas of thephotosensitive element to-the `light directed by the optical means;means for eiecting ybeing imperforate except for a shutter controlledlight entry aperture in the frontzwall; a. lens xed on the front wallacross said aperture; a iilm cartridge rotatably and removably receivedin 'the socket," said film cartridge Jcomprisinga cylindrical shellhaving aV length of iilm overlying itsinner'wall surface, endwallsclosing the ends vof the shell,`onev of said end w'alls being depres-Vsible into thefshell to enable exposure of the iilm,

and `a Vspring insidethe shell resisting depression -of said depressibleend wall; means on the housingfordepressing said depre'ssibleV end walland thereby loading its spring during insertion of the cartridge into'the socket; a light directing' element within the `socket behind thelens to direct light-'rays passing th'rughthe lens onto a defined areaof the h'n; rotation of the cartridge in the socket enabling exposure ofdifferent areas of the lm; and releasable latch means for holding thecartridge in the socket against the force of the spring in the cartridgeso that upon release of the latch means said spring automatically ejectsthe cartridge and returns the depressible end Wall to its closedposition.

18. In a camera, the combination set forth in claim 17 furthercharacterized by the fact that the means on the housing for depressingthe depressible end Wall of the cartridge comprises a boss extendinginto the socket from the front housing wall and substantially lling thesocket so as to enter the interior of the cartridge as the cartridge isinserted into the socket; and further characterized by the fact that thelight directing means is mounted in said boss.

19. In a camera adapted for use with a film cartridge having adepressible end closure: a hollow body defining a cylindrical cartridgereceiving socket opening to the rear and adapted to receive a cartridgewith its depressible end closure facing the front wall of the camerabody; a light admitting lens mounted in the front wall of the camerabody coaxially with the cylindrical socket; boss means fixed in thesocket for engaging and depressing the depressible end closure of thecartridge upon insertion of the latter into the socket, the rearmostportion of said boss means presenting contact surfaces spaced from thelens axis and disposed at opposite sides thereof so that duringinsertion of a cartridge the depressible end closure thereof engagedwith said surfaces is held against tipping; optical means within thesocket positioned to direct light rays passing through said lens andinto the socket substantially radially from the lens axis; and means onthe camera body for releasably holding a cartridge in the socket.

20. In a camera, the structure set forth in claim 19 furthercharacterized by the fact that said boss means has a cylindrical wallconcentric with the lens axis and in close juxtaposition to thecylindrical Wall of the Socket to define an annular space to receive theside Wall of' a cartridge inserted into the socket.

21. In a camera, the structure set forth in claim 19 furthercharacterized by the fact that said boss means has guide surfaces at anangle to its contact surfaces to interengage with guide surfaces on thedepressible end closure of a cartridge inserted into the socket andthereby hold the depressible end closure against lateral displacementand guide the same along the axis of the socket during insertion of thecartridge.

FRED PERLIN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 517,539 Casler Apr. 3, 1894546,198 Slayton Sept. 10, 1895 615,297 Mosher Dec. 6, 1898 687,592Barnell Nov. 26, 1901 866,257 Case Sept. 17, 1907 1,070,400 Breloff Aug.19, 1913 1,215,290 London Feb. 6, 1917 1,955,300 Kurnick Apr. 17, 19341,957,043 Harlow May l, 1934 2,083,492 Cheshire June 8, 1937 FOREIGNPATENTS Number Country Date 18,336 Great Britain Aug. 3, 1910

